CoffeeScript 1.3.x Released—
CoffeeScript 1.3.0 landed this week, rapidly followed by a bug fix in the shape of 1.3.1. CoffeeScript now enforces all of JavaScript's Strict Mode early syntax errors at compile time, its REPL has a multi-line entry mode and, well, much more ;-)

PhoneGap 1.6 Released—
PhoneGap is an HTML5 app platform that allows you to author native applications with web technologies (like JavaScript!) Amongst other things, it now includes the 'Cordova-JS' unified JavaScript layer.

Don't 'docwrite' Scripts—
Google's Steve Souders tells us to avoid document.write in scripts we're including into other pages because it causes blocking issues and hits performance.

Understanding MVVM - A Guide For JavaScript Developers—
Addy Osmani is back with another extensive post, this time digging into the MVVM (Model View ViewModel) architectural pattern as used by KnockoutJS. How does it differ to the Backbone approach and what are the pros and cons?

JavaScript Syntax Tree Visualization with Esprima—
Esprima is an ECMAScript/JavaScript parsing infrastructure for multipurpose analysis. Its creator, Ariya Hidayat, shows off how it can be used to visualize JS syntax trees for tricky bits of code.

Profiling Node.js Apps with DTrace—
At the recent dtrace.conf, Mark Cavage demonstrated how to profile a Node.js app using DTrace (a realtime dynamic tracing framework). 30 minutes long and of a reasonable quality.

JavaScript Objects and Prototypes Screencast—
Esteemed JavaScript screencast Derick Bailey is back with a look at objects, prototypes and prototypal inheritance in JavaScript, right from the basics. (It costs money but there's a 4 minute preview.)

Code and Libraries

Meteor: A New Way To Build Webapps?—
Blowing up on Hacker News and Twitter this week, Meteor presents an interesting approach to building webapps with JavaScript. It's still early days but definitely check out the screencast on this.

Zepto.js v1.0 RC1 Released—
Thomas Fuchs has unveiled the first significant release candidate of his minimalist JavaScript library for modern browsers that has a largely jQuery-compatible API. It gets an all new Web site and.. has gone semicolon free.